<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址组件引用 -->
    <my-address></my-address>
    <!-- 商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 右侧文本 -->
      <text class="cart-title-text">购物车</text>
    </view>

    <!-- 循环渲染购物车中的商品信息 -->
    <uni-swipe-action>
      <block v-for="(goods, i) in cart" :key="i">
        <uni-swipe-action-item :options="options" @click="swipeItemClickHandler(goods)">
          <my-goods
            :goods="goods"
            :show-radio="true"
            :show-num="true"
            @radio-change="radioChangeHandler"
            @num-change="numChangeHandler"
          ></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    
    <!-- 使用自定义的结算组件 -->
    <my-settle></my-settle>
  </view>
  
  <!-- 空白页面区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~~~</text>
  </view>
</template>

<script>
//1. 导入模块
import badgeMix from '@/mixins/tabbar-badge.js';
import { mapState, mapMutations } from 'vuex';

export default {
  mixins: [badgeMix],
  ...mapState('m_cart', ['cart']), //页面中循环cart即可渲染数据

  data() {
    return {
      options:[{
        text:'删除',
        style: {backgroundColor: '#c00000'}
      }]
    };
  },
  methods: {
    //mapMutations 负责映射 外部方法到组件中来
    ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount','removeGoodsById']), //2. 将cart.js的方法映射到组件)
    radioChangeHandler(e) {
      // console.log(e)
      this.updateGoodsState(e);
    },

    //
    numChangeHandler(e) {
      // console.log(e)
      // this.updateGoodsState(e)
      this.updateGoodsCount(e);
    },
    
    swipeItemClickHandler(goods){
      // console.log(goods)
      this.removeGoodsById(goods.goods_id)
    }
  }
};
</script>

<style lang="scss">
.cart-container{
  padding-bottom: 50px;
}

.cart-title {
  height: 40px;
  display: flex;
  align-items: center;
  padding-left: 5px;
  border-bottom: 1px solid #efefef;

  .cart-title-text {
    font-size: 14px;
    margin-left: 10px;
  }
}

.empty-cart{
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 150px;
  
  .empty-img{
    width: 90px;
    height: 90px;
  }
  .tip-text{
    font-size: 12px;
    color: gray;
    margin-top: 15px;
  }
}
</style>
